Packard had built its reputation as the standard American luxury car
with its early four-cylinder, and later, six-cylinder motorcars. When
Cadillac introduced its V-8 engine for 1915, Packard responded by one-upping
Cadillac with the introduction of a V-12 engine, the "Twin-Six". When the
wealthy ordered a custom-bodied car, they tended to choose a Packard Twin-Six
chassis. Demand for the V-12 was so great Packard's workforce was doubled to
keep up with orders. In 1921, Warren G. Harding used a Packard Twin-Six to
become the first president to be driven in an automobile to his inaugruation.